Governor-pulley device.



C. P. STRIT E. GOVERNOR PULLEY DEVICE.

APPLICATION FILED MAY 1, 1911.

Patented Sept. 8, 1914,

2 SHEETSSHEET 1.

C. P. STRITE.

GOVERNOR PULLEY DEVICE.

APPLICATION FILED MAY 1, 1911. 1,109,877, Patented Sept. 8, 1914.

2 SHEETS-SHEET 2.

UNITED STATES PATENT OFFICE.

CHARLES I. STRITE, OF CEDAR RAPIDS, IOWA, ASSIGNOR TO CEDAR RAPIDS FOUNDRY AND MACHINE COMPANY, OF OEDAR RAPIDS, IOWA, A CORPORATION OF IOWA.

GOVEBNOR-PULLEY DEVICE. I

Specification of Letters Patent.

I Patented Sept. 8, 1914..

Application filed m 1, 1911. Serial 110. 624,298.

To all whom it may concern Be it known that I, CHARLES P. STRITE, a

citizen of the, United States, residing at transmission of Cedar Rapids, in the county of Linn and driven at variab e speeds such, for instance,

as that operated by an internal combustion engine to a machine that must be driven at a certain predetermined speed such, for instance, as a centrifugal separator;

A furtherobject is to provides governor of this kind that occupies a minimum of space and in which the parts are readily a'ccessible for adjustment or repair.

A further object is to provide improved and simplified means for adjusting the governorpulley so that the speed of rotation at which it will commencetoioperate the driven pulley may be accurately predetermined; and also in this connection to provide means whereby, when thegovernor pulley device has once been set to operate thedriven pulley at a predetermined speed, it may readily and easily be'reset to the same position with great accuracy.

My invention consists in certain detaills, in the construction, arrangement and combination of the various parts of the device, whereby the objects contemplated are attained, as hereinafter more fully set forth,

pointed out in my claims and illustrated in the accompanying drawings, in which;

Figure 1 shows 'a central, longitudinal,

' sectional view of my improved' governor pulley device applied to an elevated support and extended downwardly therefrom. 1g.

2' shows a sectional view on the line 2-2 of Fig. 1. Fig. 3 shows-a sectional view on the line 3-3 of Fig. 1. Fig. 4 shows a sectional view on the line H of Fig. 1'. Fig. 5 shows a vertical, oentiaIh-sectional viewof ,a slightly modified form of'vmy' invention set upon a'horizontal base" and applied di-v mat to the shaft of'an internalcombustion engine, and Fig. Gshows elevation fs. I a

the referencemnmerei 1:04:0 t1n- 'a lever 34, there bei dicate the shaftto which the governor u1 ley device is applied. Two frame mem era 11 and 12 are provided for supporting the various parts of the governor pulley and these frame members have bearings 13 and 14 for theshaft, which bearings are supported in the frames by adjusting screws 15 so that Y the bearings may be accurately alined relative to the shaft. On one end-0f the'shaft 10 the driving pulley 16 is fixed and on the other end there is a rotatable sleeve 17 to which the driven pulley. 18 is fixed by means of a set screw 19. The said sleeve is extended through the bearing men1- ber 14 as clearly shown in Fig. 1. Formed integral with the sleeve 17 is a friction wheel 20 having a flange 21. Fixed to the shaft 10 adjacent to the friction wheel is a disk 22 and to this disk I have pivoted two curved levers 23 mounted on the pivot ins 24 which are attached to the disk 22. ach lever has on one end a friction shoe 25 and on the other end a weight 26.. The weight has anextensible coil spring 27 attached to it and, extended inwardly and attached to a part of the disk 22. There is also a lug 28 for each weight to limit its outward movement, said lug being attached to the disk 22.

The said springs tend to yieldingly hold the friction shoes awa from contact with the flange 21. Pivota 1y mounted in the disk- 22 are two-levers 29, each having one end extended adjacent to one of the friction shoes 25 and in said end is an adjusting screw 30 to engage-the lever 23 adjacent to the friction shoe. The remaining ends of said levers are inclined toward each other adjacent to the shaft 10, as clearly shown in Fig. l,'and they engage a ball bearing cup 31"rotatably mountedon the shaft 10 and provided with bearing balls 32.

Slidinglv androtatably-mounted upon the shaft 10 is ajsleeve33 having one designed to engage the bearingballs 32 and having its other end pivotally connected to a fork. 35 on said lever to enter slots int asides ofithe sleeve 33, as shown in Fig. 4. *The/said-lever 3-4: is preferably extended, radially from the shaft 10; and then in a direction substan- Q tially parallel with the shaft 10, shown in Fig. 1. By this wnstrmtion, it is obvious U a! v that when the we endotthe' lever 34. is to the accompanying awi n58! ,1 i n-Fig. hithe slesve3$ Wilton filled downwardly from the position shown the bar? 1 .10

ing balls 32 and tend to cause the levers-29 to hold the friction shoes in engagement with the rim. 2 1. I

In order to provide for accurate adjustment of the amount of pressure to be a plied to the lever 34, I have provided the ollowing device: Formed on OI 'fiXBd to the frame 12 is an arm 36 and slidingly mounted in I said arm is a rod 37, oneend of'which is pivoted to the lever 34 and the other end is screw threaded at 38; Mounted upon this screw threaded portion is a substantially cylindrical nut body portion 39 having formed on its outer end a substantially cupshaped handle portion 40. Within this handle portion is a age screw 41 seated in the cup-shaped han 1e portion and in line with the rod 37, there being ahead 42 on the screw 41 preferably arranged wholly within the cup-shaped prtion40 so that the operator may freely graspand turn the cu s aped portion 40 wit out engaging or changing the position 'of' the screw '41 relative to said oup-shaped-portion.' An extensible coil spring 43 is mounted on the rod 37*hetween the stationary arm-36 and the nut 39. 'A lock nut 44is placed on the screw 41'to engage the cup-shaped handle portion 40andlin1itthe'movement of the screw 41.

t In practical operation 'with this form of my invention and assuming that it is desired to'operate the driven pulley 18 by means of a variable ower such, for instance, as that'derived rom an internal combustion engine,or the like, then the operator moves the cup-shaped handle portion 40 toward the outer end of the rod 3701 until the tension of the spring 43"is' relieved, where-V upon the shaft may rotate freely and the friction'shoes will beheld out of engagen'rent with the friction rim 21 on account'cf the-extensible springs 27. After the internal combustion engine has started and attained its maximum speed and efiieiency, then the operator may, by'a manipulation "of the cupshaped handle 40, apply a pressure to the spring 43 suficient to cause the sleeve'33 to actupo'n the levers 29 in sucha manner as to overcome the-pressure of thee rings 27 so that the weights 26 are drawn inwardly, thus permitting th'e frictiongshees 251'to" on B3 a=careful manipulatio'n of-the' cup-shape -handle the frlction shoes may be'made to en age- -the friction rim 21 to only a' slight egree at first and thenlater are increasing degree untilthe' drivcm ulley attains its maximum speed, thus "a voipfing a sudden shockcaused byquickly starting the driven pulls In devices of thiskiud it is desira is that the operator may set the device-so that "the driven-pulley will'erperate only site certain predetermined, s mad and in order toaceuratel aceomplis this result, Ihavefpro vice tPgage screw 41. This' 'geffscreuw may be originall set in proper position as follows: First, t e device may be operated until, from ractical demonstration, it is determined t at the driven pulley is being operated at the desired speed and that the weights 26 will operate by centrifugal force to release the friction clutches to driven pulley to rotate at the pre etermined speed even though the shaft travels faster; then the gage screw 41 is adjusted within the cup-shaped handle 40 -until its inner end engages the outer end of the rod '37, whereupon itslock nut 44 is tightened to hold the gage screw firmly in said position; then after the device has been stopped, and assuming that it is desired to again start the internal combustion engine, the operator mayunscrew the cup shaped handle 40 until the friction shoes are free from the friction rim and start the engine in the manner before described and then at-once turn the cupshaped handle 40 to its inner limit of movement as determined by the gage screw 41, whereupon the driven pulley will increase in speed until the driving shaft has reached a certain predetermined speed of rotation and then the rotation of the driven pulley of the shaft 10 increases above the predetermined rate so that the operator need not ex periment further with the device in order to have the driven. pulley operate at a certain predetermined speed.'

In the modification illustrated in Figs. 5 and 6, I" have illustrated a construction especially designed to be applied direct to the shaft of an internal combustion engine and to be'mounted. on the base of said'engine, which device isso arranged as to be of compact form and of simple construction. In said modified forms, the numeral 45 is used to indicate the engine base having thereon the two bearings 46 and 47 for the engine shaft 48. The engine balance wheel 49 isfixed to -the shaft 48 and .it is provided with a friction flange 50. Rotatablv mounted upon the shaft 48is a sleeve 51 having at one end a disk 52 corresponding to-the disk 22 and mountedlon the disk 52 are the levers 29 carrying the frictionshoes 25. The ball instead of directly onthe shaft, as shown in 1, and the sliding sleeve 33 is also mounted on the sleeve 51. The driven pulj ley 18 is mounted upon the sleeve 51 instead of the sleeve 17':

In the-form of .my invention shown in Fig. 5, the-lever 34 is shown'to-be straight tothehase 45. The operation of the device shown in the modification is exactly likethait just-described for the preferred form of my invention. The advantage however that is gained by the-modified construction is that a governor. device is provided that ermit the.

will remain the same even though the speed I and the guide a'rm 53 for the rod 37 is fixed bearingcup 31' is mounted on'the sleeve 51 may be applied direct to the base and the frame of an internal combustionengine and the mechanism arranged in very compact and a threaded hand-wheel on the friction wheel, centrifu lly operated friction shoes carried by sai disk, springs tend,- ing to hold the friction shoes out of. engage-z ment with the friction wheel, leversconnect V ed to the friction shoes, a'slidingcollar to.

engage the levers, a lever pivoted to a stasup ort and operatively' connected tiona with t e sh g collar, a rod pivoted 'tothe lever, a stationary support through which the rod is extended, an extensible spring on the rod to engage the stationary support,

engage said spring. 1

.- 2. In a device of the, class described, the

a combination of a rotatable "friction wheel, a disk independently rotatable relative-to the friction-wheel, centrifugally operated friction shoes carried by saiddisk, springs tending to hold the friction shoes out of engagement with the, friction wheel, levers connected to the friction shoes, a slidin collar to engage the levers, a lever pivote to, a stationary supp with the S11 ing collar, a rod ivotedltojthe lever, a stationary support t rough whichthe rod is extended, an extensible spring on the rod to en age the stationary support, a threaded han -wheel on the rod to eng'a e said sprin and a gage screw seated in t e; hand-whee to engage said rod;

3. In a device of the class described, th

. combination of a rotatable friction wheeLa disk independently rotatable relative to the friction wheel, centri ed to the friction shoes, a slidin engage the levers, a lever pivot with ding collar, a rod ivoted, to the lever,'a stationary support ugh. which 0 described, thecom'blnatlon of a rotatable'frfiction wheel, .a' dlSk independently rotatable relative to the said rod and an a rod to collar, a rod pivoted to the lever, a stationlock nut on said adjustable g wengagtlala part of said cup-shape handle. ort and operatively connected 6.

combination of a shaft, a friction wheel rolly operated fric; tion shoes carried by 'sai disk, springs tend-. ing to hold the friction shoes out of engage ment with the friction wheel, levers connect-- collar to to a'sta- -tionar support and operatively connected t e s11 the rod is extended, an extensible spring on the rod to on age the stationary support, a

threaded ,han -wheel on the rod to engage said spring, a gage screw seated in the handthefg'age screw.

4. In. a'device of the class described, the combination 'of a-friction wheel, a disk rowheel toengagesaid rod, and'a lock nut for ,tatable relative thereto, centrifugally operated friction shoes to engage the friction wheel, a sliding collar, means actuated by the 'slidingcollar for forcing the friction shoes into engagement with the friction wheel, a lever connected with the. sliding collar, a rod pivoted to the lever, a stationary support through which said rod is extended, an extensible coil spring on the rod, Y

and 'in engagement with the support, a substantially cup-shaped handle screwed to s justable gage screw seated in said handle in line with said rod, for the purposes stated. 1

' 5. In a device of the class described, thecombination of a friction wheel, a 'disk rotatable relative thereto, centrifugally oper- "ated friction shoes to engage 'the friction wheel, asliding collar, means actuated by the sliding collar forforcing the "friction shoes into engagement with the friction wheel, a lever connected with the sliding ary support throu h which said rod is extended, an extensib e coil spring on the rod,

' and in engagement with the support, a substantially cup-shaped handle screwed to said rod, an adjustable gage screw seated insaid handle in line with said rod, and a e screw to a device of the class described, the

tatably mounted thereon, levers pivoted on said wheel, having friction shoeson one end for engaging the wheel and weights on the other on means for yieldingly holding said levers positionfor causing the shoes to ge the friction wheel,fa"sleeve slidably ava-as. v,

n. B. Gem. 

